High Young’s modulus NaF coating on bulk-Sn: mechanical confinement effect drives durable sodium storage by alleviating (De) sodiation stress

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ID: 320692
2026
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Abstract
Abstract Sn has emerged as a promising anode material for next-generation Sodium-ion batteries owing to its high theoretical capacity. However, the high volumetric expansion of Sn anode upon sodiation generates significant internal stress, which leads to particle cracking, pulverization, and electrode failure. Herein, we report a novel and facile approach to in-situ coat a NaF layer on bulk Sn particles via a solution supersaturation route. The high Young’s modulus of the NaF coating enables a strong mechanical confinement effect, which effectively suppresses the volume expansion and mechanical stress of Sn. Additionally, the NaF coating promotes the formation of a thin, uniform and dense solid electrolyte interphase film, thereby resulting in a significant improved Coulombic efficiency. The designed Sn@NaF anode exhibits remarkable cycling stability and low-temperature adaptability in both half cell and full cell. These results highlight the great potential of the Sn@NaF anode for high energy density SIBs.
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openalex_W7168050100 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Huiqian Xiong, Bo Li, Yi-Xiang Wang, Yue Wang, Zhaoyu Rong, Yakun Tang, Y ZHANG, Yongjin Fang, Zhongxue Chen, J Huang, Y Cao
Journal national science review
Year 2026
DOI
10.1093/nsr/nwag428
URL
https://doi.org/10.1093/nsr/nwag428
Keywords Keywords not found

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